Control for elevator-doors.



. W. E. WRAGG.

CONTROL FOR ELEVATOR DOORS. APPLICATION FILED [150.113.1916.

. 1,240,291. Patented Sept 18,1917.

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CONTROL FOR ELEVATOR DOORS. APPL|CATION FILED DEC. 16. 1916.

1,240,291. Patented Sept. 18,1917.

I 4 2 SHEETS-SHEET 2. 2//'/ A i 5 i 9 l 0 I j f 4 2 jg I 1 I i 11- 5 1 0 i E WILLIAM E. WRAGG, OF PHILADELPHIA, PENNSYLVANIA.

' CONTROL ro'n ELEVATOR-DOORS.

Specification of Letters Patent.

Patented Sept. 18, 1917.

Application filed December 16, 1916. Serial No. 137,348.

To all whom it may concern:

Be it known that I, WILLIAM E. WRAGG,

a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Controls for Elevator-Doors, of which the following is a specification. My invention relates to improvements in controls for elevator doors, the object of the invention being to provide improved means for opening elevator doors by the ascent or descent of the elevator, and permit the operator to position the operating mechanism so as to pass a door without opening the same.

A further object is to provide improved means carried by an elevator, adapted when in one position to cause the opening of the door when the elevator ascends or descends, and. when in another position, permits the elevator to pass the door without opening.

It is to be understood that my invention applies to that class of elevators in which doors or gates are provided at the different floors, which are designed to be opened automatically by the elevator in ascending or descending, and my invention consists in the provision of novel means for controlling the operation of the doors, permitting such operation to be atthe will of the elevator operator.

lVith these and other objects in view the invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings:

Figure 1 is a fragmentary view showing a portion of an elevator and elevator shaft,

and illustrating my improved means for controlling the opening of the door.

Fig. 2 is an enlarged view in section on the line 22 of Fig. 1.

Fig. 3 is an enlarged fragmentary view in section on the line 33 of Fig. 1.

Fig. t is a view in elevation illustrating the door and its operating mechanism.

Fig. 5 is a fragmentary view in side elevation, illustrating the lever 20 and its adjacent parts.

Fig. 6 is an enlarged view in section on the line 66 of Fig. 5.

Fig. 7 is a similar view on the line 7-7 of Fig. 5, and v Fig. 8 is a fragmentary perspective view showing a fragment of the chain 15 to illustrate the manner of securing the lugs thereto.

1 represents an elevator door, and I would have it understood that I use this term elevator door to apply to such doors as are used at the floors or landings, which are a barrier to the elevator shaft, and do not intend such term to apply to such doors as are'carried by the elevator itself. I

The door 1 is normally secured in its lower position by spring bolts 2, and branch cables 3 are secured to the door 1,and pass through eyes 4 on the door, and also through eyes 5 on the bolts 2 so that when the cables are drawn taut in the act of elevating the door, they cause the bolts to unlock the door, and when the door closes, the slack in the cable permits the spring bolts to lock.

The branch cables 3 are secured to an operating cable 6 which passes over idle pulleys 7 and 8, and is secured to an operating pulley 9. This pulley 9 is shown most clearly in Fig. 3, and I would have it understood that the turning movement of the pulley 9 in either direction, causes the cable 6 to wind thereon and elevate the door 1.

Pulley 9 is secured to a shaft 10 supported in a frame 11, and on this shaft 10 a sprocket wheel 12 is also. secured. A sprocket wheel 13 is supported by the frame 11, and an endless sprocket chain 15 is located around the sprocket wheels 12 and 13. Two links 14 of the chain 15 are made in the form of laterally projecting plates, to which angular lugs 16 are secured.

17 represents an -elevator, and 18 the cable controlling the movement thereof. A

vertical post 19 is secured to the elevator 17, and rigidly held in any approved manner. On the post 19, a sleeve 21 is mounted to turn, but is held against vertical movement by collars 22 secured on the post. The rotary movement of sleeve 21 is limited by a pin 23 which projects through a slot 24 in the sleeve, and the turning movement of the sleeve is controlled by a lever 20, which is pivotally connected to a clamping collar 25 on the sleeve, and which may be positioned at either side of the pin 23 for a purpose which will hereinafter appear.

I, upper dog 26 causes the door to open when is moved upwardly.

Weighted dogs 26 and 27 are pivotally connected to clamping collars 28 on the sleeve 21, adjacent their respective ends, and these dogs are adapted to engagethe lugs 16, and cause the door 1'to openwhen approached by the elevator.

It is of course to be understood, that the the elevator is moved upwardly, and the dog 27 causes the door to open when the elevator is moved downwardly.

When it is desired to pass a floor without opening the door, it is simply necessary for the operator to swing the lever 20 outwardly, and then turn sleeve 21 to move the dogs 26 and 27 out of the path of lugs 16.

The lever 20 will fall by gravity andhold the sleeve against accidental turning movement. The dog 26 is so shaped that it 'will pivot and pass the lugs 16, when the elevator is moved downwardly, and the dog 27 will pivot and pass the lugs 16 when the elevator The lugs are so positioned that the door 1 is opened just as the elevator reaches the floor, and closes as soon as the elevator leaves the floor, as the movement of the chain 15 of the dogs causes the lugs 16- to ride around the curve of the precise details set forth, but consider myself atliberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.-

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination with a vertically movable door, and vertically movable lugs controlling the movement of the door, of an elevator, a member on the elevator having partial rotary movement, pivoted dogs carried by the member and adapted to engage the lugs, a fixed'part, and a lever pivotally conto permit'movement of the member.

2. The combination with a vertically movable door and vertically movable lugs conadapted to move the same, and constructed to lock the'same in different positions.

3. The combination with a vertically movable door, of an endless chain adapted when moved, to move the door, and lugs projecting from the chain, of an elevator, avertical post secured to the elevator, a sleeve having limited turning movement on the post, a pin on the post, a slot in the sleeve receiving the pin and limiting the turning movement of the sleeve, a lever pivotally connected to the sleeve and adapted to rest on either side of said pin, and pivoted dogs carried by the sleeve adapted to engage the lugs and move the chain to open the door, when the elevator approaches the same. I

4. The combination with an elevator door, a spring bolt normally holding the elevator door in closed position, and having an eye thereon, an operating cable secured at one end to the door, aneye on the door, said cable passed through the eye of the bolt and through said last mentioned eye, and adapted when drawn taut to move the bolt from its locked position, an elevator, and means on the elevator for causing the movement of the cable to release the bolt and open th door. r

In testimony whereof I have signed my name to this specification in the presence of tow subscribing witnesses. V

WILLIAMVE. waited Witnesses: i i

ELEANOR F. MURRAY, WILLIAM CONWAY.

. Copies of this patent may be obtained for five cents each, by addressing theifGommissioner 0! Patents.

Washington, D. 0. 

